/**
 * ***************************************************************************** Copyright (c) 2000,
 * 2009 IBM Corporation and others. All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0 which accompanies this
 * distribution, and is available at http://www.eclipse.org/legal/epl-v10.html
 *
 * <p>Contributors: IBM Corporation - initial API and implementation
 * *****************************************************************************
 */
package org.eclipse.core.resources;

import java.util.EventListener;

/**
 * An interface to be implemented by objects interested in path variable creation, removal and value
 * change events.
 *
 * <p>Clients may implement this interface.
 *
 * @since 2.1
 */
public interface IPathVariableChangeListener extends EventListener {
  /**
   * Notification that a path variable has changed.
   *
   * <p>This method is called when a path variable is added, removed or has its value changed in the
   * observed <code>IPathVariableManager</code> object.
   *
   * @param event the path variable change event object describing which variable changed and how
   * @see IPathVariableManager#addChangeListener(IPathVariableChangeListener)
   * @see IPathVariableManager#removeChangeListener(IPathVariableChangeListener)
   * @see IPathVariableChangeEvent
   */
  public void pathVariableChanged(IPathVariableChangeEvent event);
}
